Chaeles la dow



(No Model.)` C. LA DOW.

- j B RASBR. No. 337,505.

{'7 mi. agua? Patented Mar. 9, 1886.v

@Miren STATES Aram OFFICE.

CHARLES LA DOW, OF ALBANY, NEW YORK.

ERASER.

SPECIFICATION forming part of Letters Patent No. 337,505l dated March 9,1886. Application tiled December 14, 1885. Serial No. 185,582. (lilomodel.)

.T0-@ZZ whom t may concern:

Improvement in Erasers, of which the following is a specification.

My invention relates to erasers which may be used alone or in connectionwith a penholder or a lead-pencil 'or like implements;

and the object of my invention is to provide a rubber eraser whosesurface shall be exposed for use as needed and adapted to be more orless exposed, according to the pleasure of the user, and also to providea rubber eraser so sheathed that it may bc unsheathed for use as thesame is worn away, and that it may be unsheathed automatically; and thefurther object of my invention is to provide such an eraser adapted tobe attached to and operated automatically on a pen Aor pencil holder,and also to be used in connection with a blade eraser or file. I attainthese objects by means of the instruinentalities shown in theaccompanying drawings, which drawings are made a part of thisspeciiication, and in which- Figure 1 is a longitudinal section ofpencil and eraser device, showing pencil A, sheath B, rubber plug oreraser C, and space D between sheath and rubber, in which the knifebladeand iile b d play, being clamped by stud .fr to encircling ring f on theoutside the sheath y, and a being correlative screw-threads onl thepencil and sheath. Fig. 2 is adrawing of the same design, showing slit iin the sheath for adapting the same to pencils or holders of differentthicknesses, and showing e, a slot in the sheath, in which shank arplays, to allow the ring f motion up and down the sheath. Theknii'eblade d is extended and shown (b) in dotted line withdrawn in thesheath. Fig. 3 is a transverse section through the erasing device at x,showing erasing-plug C and the sheath B bent angularly away from theeraser to allow the knii'eblade to play within the sheath independentlyof the rubber eraser, also showing the ringf conforming to theangularity ofthe sheath. Fig. 4 shows a modi cation of the device forscrewing the sheath up or down on a pencil or holder, p being a peg inthe pencil, which acts as a screw-thread.

Fig. 5 shows pegp acting in a slot, g. Fig. 6 shows the sheath providedwith sloth, adapted to allow the same to be moved up or down on theholder; Fig. 7, a knife-blade operated by means of a stud, x, without aring.

To carry out my invention, I construct a tube, B, of convenient size andproportion, of suitable material, preferably of metal, and raise arectangular groove on one side along its length, adapted to receive anarrow blade, as shown, B and b, Figs. l, 2, and 3. In this grooved partI cut a slot, e, and upon this tube or sheath I mount a ring, f, adaptedto slide upon it, being angled to conform with it, (saine iguresf.) Theblade d is attached to this ring by a stud or bolt, x, the blade beingwithin the rectangular groove D, and the ring without the tube, and thebolt a passing throughA the sheath and playing in the slot e. By thismeans when the ringf is moved along the sheath or tube B the bladecl,with its file, is protruded from the sheath beyond the rub ber eraserC, as shown, Fig. 2, and when the ring is withdrawn the blade issheathed, as at d, Fig. l, or dotted line, Fig. 2, so that the rubbereraser is left protruding for use.

The sheath is adapted to contain a plug or piece of rubber of suitablesize and composition for erasing purposes, and to retain this rubber byfriction so its rear end shall rest on the top of the pencil or penholder or other suitable stop or handle.

The end of the pencil or holder I cut into screw-threads a, Figs. l and2, or I mount an equivalent metal threaded tip on the holder, upon whichthe sheath or tube B is adapted, by the corresponding male thread, i, tobe screwed backward or forward. Obviously by this construction as thesheath is screwed downward or backward upon the holder or pencil theelastic eraser C is made to protrude from the sheath for use, and isheld in position iirml y by friction with the sheath,and thus as theeraser is wornv away in use it can be automatically renewed at the willof the user till the rubber is exhausted, when a new plug of rubber canbe inserted in the sheath When the sheath is moved in the other direc'-tion, (upward or forward,)the rubber plug may be pushed back in thesheathv till it rests on the end of the pencil, so that when the rubberis not in use it will be wholly inclosed and` protected in the sheathand held there by frictional contact therewith.

The sheath is removablefor the insertion of new elastic erasers, and maybe rectangular' or polygonal and the eraser of similar shape.

By t-his structural arrangen'ient obviously the elastic eraser is firmlyheld in any position in the sheath by frictional contact therewith, andthe knil`e-eraser or the rubber eraser may be protruded for useindependently and at will.

The slot t, Fig. 2,'in the screw-thread ot" `volvinfbr the sheath uponthe handle A or pencil end it will be moved up or down, as the case maybe, on the pencil, and cause the rubber to protrude or be withdrawn inthe manner bel'ore explained.

Another modification I construct, as shown in Fig. 5, by cutting.;`aweaving` or curving;` slot in the sheath, at g, in which the peg pplays, by which means in like manner the sheath may be worked up or downto protrude the eraser.

In the last two modifications the blade'eraser is mounted on the sheathin the manner before described, and preferably on the side of the sheathopposite the peg-slot.

The slot 7L (shown in Fig. 6) is a modification adapted to hold thesheath on the pencil or handle by friction, allowing it readily to bemoved up or down thereon to protrude the rubber eraser. rllhebladceraser may be mounted on the sheath or tube by means ot' astndmerely, instead of the ring,` before described, as shown in Fig. 7 at m,the stud being, like ring f, Figs. l and 2, adapted Ato play in the slote, to be pushed forward and backward therein for the purpose ofprotruding or withdrawing the bladeerascr.

Either the ring or stud with the knife-blade or tile or blade-eraser maybe used with the various constructions ofthe sheath B,as hereindescribed, or this eraser may be dispensed with, or be used alone, therubber eraser being dispensed with. W'hen the rubber eraser is usedalone in this construction, the sheath may be constructed without thelongitudinal groove angled outward, hereinbefore described and shown,Fig. 3, B at b.

The method of construction and operation and the advantages ofmyinventionwill be obvious to those skilled in the art from theforegoing description.

I am aware that pencils have been made with the erasive material rigidlyattached' thereto and provided with a shield adapted loosely to coverthe eraser.

Vhat I claim as of my own invention, and

desire to secure by Letters Patent, is-

l. The sheath B, the pencil A, engaging the sheath-screw, and theelastic eraser C, held in said sheath frictionally and movable therein.

2. The pencil or holder A, having,` a peg or other equivalent mechanismnear one end to engage the sheath-screw, the sheath B, which inclosessaid end, and the elastic eraser C, held inclosed in said sheathfrictionallyV and movable therein.

3. The metal eraser d and its attachments and the elastic eraser C, incombination with a tubular inclosing-sheath, B, in which they arelodged, and whereby they are mounted on a suitable holder, A, the sheathbeing movable upon the eraser C and holder and coacting therewith whenmoved thereon to protrude or withd raw the eraser C.

4. The holder A, having a peg set near one end to engage thesheathscrew, the sheath B, which incloses said end, the elastic eraserC, held inclosed in said sheath by friction, and the metal eraser d,inclosed in said sheath and operated therewith by the ring or stud xthrough a slot in said sheath, substantially as described.

CHARLES, LA Dow.

Wit-nesses:

WM. P. RUDD, FREDK. Hamers.

